Chemical Composition Element Content (wt. %) C ≤0.020 Si ≤1.00 Mn ≤2.00 P ≤0.045 S ≤0.035 Cr 19.0–23.0 Ni 23.0–28.0 Mo 4.0–5.0 N ≤0.10 Other Cu: 1.0–2.0; Fe: Balance

Mechanical Properties Condition Tensile Strength Yield Strength (0.2%) Elongation Hardness Solution annealed ≥490 ≥220 ≥35 ≤215 HB / ≤95 HRB

Sulfuric acid equipment Chemical processing Pollution-control systems Pharmaceutical plants Seawater equipment Acid-handling piping

Chemical Composition Element Content (wt. %) C ≤0.020 Si ≤1.00 Mn ≤2.00 P ≤0.045 S ≤0.035 Cr 19.0–23.0 Ni 23.0–28.0 Mo 4.0–5.0 N ≤0.10 Other Cu: 1.0–2.0; Fe: Balance

Mechanical Properties Condition Tensile Strength Yield Strength (0.2%) Elongation Hardness Solution annealed ≥490 ≥220 ≥35 ≤215 HB / ≤95 HRB

Sulfuric acid equipment Chemical processing Pollution-control systems Pharmaceutical plants Seawater equipment Acid-handling piping

904L Stainless Steel Welded Pipe

Grade: 904L/UNS N08904/W.Nr.1.4539

Size: 12mm*0.5mm-2000mm*100mm

Length: 1000mm-12000mm

Standard: ASTM A312, ASTM A269, ASTM A790, ASTM A789 etc.

Surface: No.1(Pickling), Bright(Polished)

904L Stainless Steel Pipe is a high-alloy super austenitic stainless steel with elevated nickel, chromium, molybdenum, and copper contents. It offers excellent resistance to sulfuric acid, chloride-containing media, pitting, crevice corrosion, and stress corrosion cracking. 904L pipe is commonly used in chemical processing, acid-handling systems, pollution control, pharmaceutical equipment, seawater service, and demanding industrial process piping applications.

Chemical Composition

Element	Content (wt. %)
C	≤0.020
Si	≤1.00
Mn	≤2.00
P	≤0.045
S	≤0.035
Cr	19.0–23.0
Ni	23.0–28.0
Mo	4.0–5.0
N	≤0.10
Other	Cu: 1.0–2.0; Fe: Balance

Mechanical Properties

Condition	Tensile Strength	Yield Strength (0.2%)	Elongation	Hardness
Solution annealed	≥490	≥220	≥35	≤215 HB / ≤95 HRB

Sulfuric acid equipment
Chemical processing
Pollution-control systems
Pharmaceutical plants
Seawater equipment
Acid-handling piping

Introduction

Specification

Chemical Composition

Element	Content (wt. %)
C	≤0.020
Si	≤1.00
Mn	≤2.00
P	≤0.045
S	≤0.035
Cr	19.0–23.0
Ni	23.0–28.0
Mo	4.0–5.0
N	≤0.10
Other	Cu: 1.0–2.0; Fe: Balance